Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong xuong » khong dung, hong vuong, thong duong
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
ban thanh » ban hanh, ban hang
theo cau » theo cap, theo dau, theo mau
theo chu » theo chieu, cho chu, chao chu
van than » van thanh, van thang, van tuan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo cau) OR (theo chu)) sach - thanh trung cua khong xuong ((van than) or (ban thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo cau) OR (theo chu)) sach - thanh trung cua khong xuong ((van than) OR (ban thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo cau) OR (theo chu)) sach - thanh trung cua khong xuong ((van than) or (ban thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: ((theo cau) OR (theo chu)) sach - thanh trung cua khong xuong ((van than) or (ban thanh)) cau*.